Circular toilets

A public toilet and treatment system in one serviceable enclosure

A ReFlow toilet is a circular public toilet: wastewater is collected, treated on site, and returned to the unit's water cycle so effluent is not designed to leave as a liquid discharge. Cubicles, a contained treatment area, power and controls, and service access are planned together for the site and the people who will operate it.

Public cubicle doors on a ReFlow cabin in Hyderabad
Public cubicle doors on a ReFlow cabin.

What is a ReFlow toilet?

Treat on site. Keep water in the cycle.

ReFlow brings technologies, operating models, and site operations together for circular public sanitation. Zero discharge here means the design intent: no effluent discharged from the unit; water stays in the cycle. Exact process, loading, and acceptance data belong to the contracted configuration.

Collect

Wastewater from the cubicles is collected and regulated so downstream stages receive a manageable flow.

Treat on site

Staged treatment inside the enclosure reduces the load. Further treatment and disinfection are selected for the site brief.

Reuse in the cycle

Treated water is configured for non-potable reuse in the unit. Residuals still need a responsible handling route.

Operate in view

Inspections, photographs, alerts, and maintenance records make follow-up visible to the assigned team.

Service access

A separate service side supports inspection, sampling, consumables, and component maintenance without mixing with public use.

Specify the site

Layout, utilities, civil works, and who operates the unit are defined before placement—not inferred from a product nickname.

This is a functional overview, not an as-built process design. Equipment schedules, process settings, piping, safety controls, and acceptance criteria are supplied only for the contracted configuration.

How deployment works

From site assessment to operator handover

  1. Assess: expected use, access, utilities, ground and drainage conditions, approvals, and operating ownership.
  2. Define interfaces: civil works, lifting and placement, power, makeup water, the reuse boundary, and service access.
  3. Configure: select the enclosure and internal arrangement against the approved brief; do not infer capacity from container length alone.
  4. Install and commission: place and connect the unit, verify controls and safety systems, start treatment progressively, and document acceptance.
  5. Hand over: train responsible staff, establish inspection and maintenance routines, and agree escalation and reporting.
Accessible service area with labelled treatment pipework inside a ReFlow field unit
Pipework and equipment inside the treatment enclosure, July 2026.

Configurations and evidence

20-foot and 40-foot layouts

Project archives document both 20-foot and 40-foot circular-toilet layouts. A separate operating manual describes one 40-foot reference configuration. Cubicle count, treatment duty, and service access are confirmed for each site.

Available layout families

20-foot and 40-foot container layouts are documented in the project archive. Cubicle count, treatment duty, accessibility, utility interfaces, and service access are confirmed per proposal.

What procurement receives

The selected configuration should carry its own scope, drawings, equipment schedule, site dependencies, commissioning plan, operating responsibilities, and validated acceptance data.

Benefits and limits

Why teams consider a modular circular toilet

Potential operating benefits

  • Factory-built structure with defined public and service zones.
  • Modular placement where a site-specific assessment supports it.
  • Accessible equipment and replaceable components for planned service.
  • Clearer ownership through inspections, alerts, photographs, and maintenance records.
  • A repeatable procurement and handover framework that can be adapted by site.

What still depends on the site

  • Permissions, civil works, safe access, ventilation, and utility availability.
  • Actual loading, treatment requirements, sampling, and regulatory acceptance.
  • Trained operators, treatment-compatible cleaning, consumables, spares, and maintenance funding.
  • Makeup water, energy, and a responsible route for residuals.
  • Commissioning evidence for the exact installed configuration.

A practical standard is the ambition

Make local treatment inspectable, maintainable, and accountable

ReFlow's goal is to make circular toilets practical to specify and operate across suitable public sites. That is a company design goal.